Category Archives: Tester repair

Triplett 3212 “Tube Analyser”, Tube Tester

Other updates are the replacement of the copper oxide rectifier with a silicon rectifier (1N4007), and replacement of the old paper cap with a polyester capacitor of the same 0.1 microfarad capacitance at 630 WVDC. The copper oxide rectifier is safer than selenium, but still has significant reverse bias leakage, the silicon diode has much less leakage, so a significant upgrade to performance. Continue reading

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